Ask youself this question; do you want to be in the Navy or the Marine Corps? You need to answer that question first before you should think about committin to flight school/OCS/ROTC, etc.
Since 50% of all naval aviators are helo pilots and (I'm guessing based on numbers) that the Marines have a higher precentage going helos, you need to consider:
1) You are looking at a military career, so you need to figure out what service you would like to be with for at least 10 years.
2) You are most likley NOT going to be a fighter pilot. The sooner you come to grips with reality, the sooner you can make an informed decision about a military career.
Do you have a chance to become a fight pilot, assuming you get into flight school, yes. Are the odds in your favor, NO!!!
You can "bust your hump" all you want, but some folks just can't grasp flying soon enough to make the grade to get jets.
So, you need to ask yourself, when you're doing a tour out of the cockpit, what service do you wish to be in; once you answer that, then you'll have your answer.
This is completely true. The odds are not in your favor. Many people who enter flight school share your enthusiasm for fighters and hope to select them after primary. For a majority of students, this changes after they go through aerobatics. During this phase, you get to experience lots of manuevers such as loops and spins that let your body experience some new things such as disorientation and air sickness. Some of this goes away, some doesn't but ultimately it changes alot of students' minds.